Revert of [turbofan] Add the StackSlot operator to turbofan.

test/cctest/compiler/codegen-tester.h

Index: test/cctest/compiler/codegen-tester.h
diff --git a/test/cctest/compiler/codegen-tester.h b/test/cctest/compiler/codegen-tester.h
index 9af135e06748caba0e72b74ef133a5cb494e3d11..df445fb9acda38d97cd5a4ad7b5bd8e21aa0420e 100644
--- a/test/cctest/compiler/codegen-tester.h
+++ b/test/cctest/compiler/codegen-tester.h
@@ -96,6 +96,7 @@
     return parameter_nodes_[index];
   }
 
+
   // The BufferedRawMachineAssemblerTester adds a Store node to the IR graph
   // to store the graph's return value in memory. The memory address for the
   // Store node is provided as a parameter. By storing the return value in
@@ -243,6 +244,7 @@
                               ? nullptr
                               : Load(p3, RawMachineAssembler::Parameter(3));
   }
+
 
   // The BufferedRawMachineAssemblerTester does not pass parameters directly
   // to the constructed IR graph. Instead it passes a pointer to the parameter